A lateral interbody implant containing 2 interfixated bone screws was inserted in the l4-l5 disc space on (b)(6) 2010.There was no supplemental fixation added posteriorly at that time.4-month post-op plain film dated (b)(6) 2011 showed the l5 (inferior) screw had begun backing out of the interbody implant and a moderate amount of implant subsidence was also noted.6 month follow-up films on (b)(6) 2011 showed additional screw backout and interbody subsidence.On (b)(6) 2014 the pt presented with right groin pain, at which point plain film depicted the inferior screw had further backed out of the interbody device.Revision surgery was performed on (b)(6) 2014, during which the screw was removed and unilateral pedicle screws were added.The removed lateral screw was discarded by the user facility.
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